spire example fail

gistfile1.txt

[debug] Waiting for thread run-main to exit
[error] (run-main) java.lang.AbstractMethodError: spire.example.RandomForestExample$$anonfun$1.apply(Ljava/lang/Object;)Ljava/lang/Object;
java.lang.AbstractMethodError: spire.example.RandomForestExample$$anonfun$1.apply(Ljava/lang/Object;)Ljava/lang/Object;
        at spire.example.CrossValidation$.loop$1(DataSets.scala:234)
        at spire.example.CrossValidation$.crossValidate(DataSets.scala:242)
        at spire.example.CrossValidation$.crossValidateClassification(DataSets.scala:259)
        at spire.example.RandomForestExample$.testClassification(randomforest.scala:40)
        at spire.example.RandomForestExample$delayedInit$body.apply(randomforest.scala:24)
        at scala.Function0$class.apply$mcV$sp(Function0.scala:40)
        at scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:12)
        at scala.App$$anonfun$main$1.apply(App.scala:71)
        at scala.App$$anonfun$main$1.apply(App.scala:71)
        at scala.collection.immutable.List.foreach(List.scala:318)
        at scala.collection.generic.TraversableForwarder$class.foreach(TraversableForwarder.scala:32)
        at scala.App$class.main(App.scala:71)
        at spire.example.RandomForestExample$.main(randomforest.scala:21)
        at spire.example.RandomForestExample.main(randomforest.scala)